402 lines
14 KiB
Objective-C
402 lines
14 KiB
Objective-C
/**
|
|
* Copyright (c) 2015-present, Facebook, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This source code is licensed under the BSD-style license found in the
|
|
* LICENSE file in the root directory of this source tree. An additional grant
|
|
* of patent rights can be found in the PATENTS file in the same directory.
|
|
*/
|
|
|
|
#import "RCTImageLoader.h"
|
|
|
|
#import <libkern/OSAtomic.h>
|
|
#import <UIKit/UIKit.h>
|
|
|
|
#import "RCTConvert.h"
|
|
#import "RCTDefines.h"
|
|
#import "RCTImageUtils.h"
|
|
#import "RCTLog.h"
|
|
#import "RCTNetworking.h"
|
|
#import "RCTUtils.h"
|
|
|
|
@implementation UIImage (React)
|
|
|
|
- (CAKeyframeAnimation *)reactKeyframeAnimation
|
|
{
|
|
return objc_getAssociatedObject(self, _cmd);
|
|
}
|
|
|
|
- (void)setReactKeyframeAnimation:(CAKeyframeAnimation *)reactKeyframeAnimation
|
|
{
|
|
objc_setAssociatedObject(self, @selector(reactKeyframeAnimation), reactKeyframeAnimation, OBJC_ASSOCIATION_COPY_NONATOMIC);
|
|
}
|
|
|
|
@end
|
|
|
|
@implementation RCTImageLoader
|
|
{
|
|
NSArray *_loaders;
|
|
NSArray *_decoders;
|
|
NSURLCache *_cache;
|
|
}
|
|
|
|
@synthesize bridge = _bridge;
|
|
|
|
RCT_EXPORT_MODULE()
|
|
|
|
- (void)setBridge:(RCTBridge *)bridge
|
|
{
|
|
// Get image loaders and decoders
|
|
NSMutableArray *loaders = [NSMutableArray array];
|
|
NSMutableArray *decoders = [NSMutableArray array];
|
|
for (id<RCTBridgeModule> module in bridge.modules.allValues) {
|
|
if ([module conformsToProtocol:@protocol(RCTImageURLLoader)]) {
|
|
[loaders addObject:module];
|
|
}
|
|
if ([module conformsToProtocol:@protocol(RCTImageDataDecoder)]) {
|
|
[decoders addObject:module];
|
|
}
|
|
}
|
|
|
|
// Sort loaders in reverse priority order (highest priority first)
|
|
[loaders sortUsingComparator:^NSComparisonResult(id<RCTImageURLLoader> a, id<RCTImageURLLoader> b) {
|
|
float priorityA = [a respondsToSelector:@selector(loaderPriority)] ? [a loaderPriority] : 0;
|
|
float priorityB = [b respondsToSelector:@selector(loaderPriority)] ? [b loaderPriority] : 0;
|
|
if (priorityA > priorityB) {
|
|
return NSOrderedAscending;
|
|
} else if (priorityA < priorityB) {
|
|
return NSOrderedDescending;
|
|
} else {
|
|
return NSOrderedSame;
|
|
}
|
|
}];
|
|
|
|
// Sort decoders in reverse priority order (highest priority first)
|
|
[decoders sortUsingComparator:^NSComparisonResult(id<RCTImageDataDecoder> a, id<RCTImageDataDecoder> b) {
|
|
float priorityA = [a respondsToSelector:@selector(decoderPriority)] ? [a decoderPriority] : 0;
|
|
float priorityB = [b respondsToSelector:@selector(decoderPriority)] ? [b decoderPriority] : 0;
|
|
if (priorityA > priorityB) {
|
|
return NSOrderedAscending;
|
|
} else if (priorityA < priorityB) {
|
|
return NSOrderedDescending;
|
|
} else {
|
|
return NSOrderedSame;
|
|
}
|
|
}];
|
|
|
|
_bridge = bridge;
|
|
_loaders = loaders;
|
|
_decoders = decoders;
|
|
_cache = [[NSURLCache alloc] initWithMemoryCapacity:5 * 1024 * 1024 // 5MB
|
|
diskCapacity:200 * 1024 * 1024 // 200MB
|
|
diskPath:@"React/RCTImageDownloader"];
|
|
}
|
|
|
|
- (id<RCTImageURLLoader>)imageURLLoaderForURL:(NSURL *)URL
|
|
{
|
|
if (RCT_DEBUG) {
|
|
// Check for handler conflicts
|
|
float previousPriority = 0;
|
|
id<RCTImageURLLoader> previousLoader = nil;
|
|
for (id<RCTImageURLLoader> loader in _loaders) {
|
|
if ([loader canLoadImageURL:URL]) {
|
|
float priority = [loader respondsToSelector:@selector(loaderPriority)] ? [loader loaderPriority] : 0;
|
|
if (previousLoader) {
|
|
if (priority == previousPriority) {
|
|
RCTLogError(@"The RCTImageURLLoaders %@ and %@ both reported that"
|
|
" they can load the URL %@, and have equal priority"
|
|
" (%g). This could result in non-deterministic behavior.",
|
|
loader, previousLoader, URL, priority);
|
|
}
|
|
} else {
|
|
previousLoader = loader;
|
|
previousPriority = priority;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Normal code path
|
|
for (id<RCTImageURLLoader> loader in _loaders) {
|
|
if ([loader canLoadImageURL:URL]) {
|
|
return loader;
|
|
}
|
|
}
|
|
return nil;
|
|
}
|
|
|
|
- (id<RCTImageDataDecoder>)imageDataDecoderForData:(NSData *)data
|
|
{
|
|
if (RCT_DEBUG) {
|
|
// Check for handler conflicts
|
|
float previousPriority = 0;
|
|
id<RCTImageDataDecoder> previousDecoder = nil;
|
|
for (id<RCTImageDataDecoder> decoder in _decoders) {
|
|
if ([decoder canDecodeImageData:data]) {
|
|
float priority = [decoder respondsToSelector:@selector(decoderPriority)] ? [decoder decoderPriority] : 0;
|
|
if (previousDecoder) {
|
|
if (priority == previousPriority) {
|
|
RCTLogError(@"The RCTImageDataDecoders %@ and %@ both reported that"
|
|
" they can decode the data <NSData %p; %tu bytes>, and"
|
|
" have equal priority (%g). This could result in"
|
|
" non-deterministic behavior.",
|
|
decoder, previousDecoder, data, data.length, priority);
|
|
}
|
|
} else {
|
|
previousDecoder = decoder;
|
|
previousPriority = priority;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Normal code path
|
|
for (id<RCTImageDataDecoder> decoder in _decoders) {
|
|
if ([decoder canDecodeImageData:data]) {
|
|
return decoder;
|
|
}
|
|
}
|
|
return nil;
|
|
}
|
|
|
|
- (RCTImageLoaderCancellationBlock)loadImageWithTag:(NSString *)imageTag
|
|
callback:(RCTImageLoaderCompletionBlock)callback
|
|
{
|
|
return [self loadImageWithTag:imageTag
|
|
size:CGSizeZero
|
|
scale:1
|
|
resizeMode:UIViewContentModeScaleToFill
|
|
progressBlock:nil
|
|
completionBlock:callback];
|
|
}
|
|
|
|
- (RCTImageLoaderCancellationBlock)loadImageWithTag:(NSString *)imageTag
|
|
size:(CGSize)size
|
|
scale:(CGFloat)scale
|
|
resizeMode:(UIViewContentMode)resizeMode
|
|
progressBlock:(RCTImageLoaderProgressBlock)progressHandler
|
|
completionBlock:(RCTImageLoaderCompletionBlock)completionBlock
|
|
{
|
|
if (imageTag.length == 0) {
|
|
RCTLogWarn(@"source.uri should not be an empty string <Native>");
|
|
return ^{};
|
|
}
|
|
|
|
__block volatile uint32_t cancelled = 0;
|
|
RCTImageLoaderCompletionBlock completionHandler = ^(NSError *error, UIImage *image) {
|
|
if ([NSThread isMainThread]) {
|
|
|
|
// Most loaders do not return on the main thread, so caller is probably not
|
|
// expecting it, and may do expensive post-processing in the callback
|
|
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
|
|
if (!cancelled) {
|
|
completionBlock(error, image);
|
|
}
|
|
});
|
|
} else if (!cancelled) {
|
|
completionBlock(error, image);
|
|
}
|
|
};
|
|
|
|
// Find suitable image URL loader
|
|
NSURLRequest *request = [RCTConvert NSURLRequest:imageTag];
|
|
id<RCTImageURLLoader> loadHandler = [self imageURLLoaderForURL:request.URL];
|
|
if (loadHandler) {
|
|
return [loadHandler loadImageForURL:request.URL
|
|
size:size
|
|
scale:scale
|
|
resizeMode:resizeMode
|
|
progressHandler:progressHandler
|
|
completionHandler:completionHandler];
|
|
}
|
|
|
|
// Check if networking module is available
|
|
if (![_bridge respondsToSelector:@selector(networking)]) {
|
|
RCTLogError(@"No suitable image URL loader found for %@. You may need to "
|
|
" import the RCTNetworking library in order to load images.",
|
|
imageTag);
|
|
return ^{};
|
|
}
|
|
|
|
// Use networking module to load image
|
|
if ([_bridge.networking canHandleRequest:request]) {
|
|
|
|
__weak RCTImageLoader *weakSelf = self;
|
|
__block RCTImageLoaderCancellationBlock decodeCancel = nil;
|
|
RCTURLRequestCompletionBlock processResponse =
|
|
^(NSURLResponse *response, NSData *data, __unused NSError *error) {
|
|
|
|
// Check for http errors
|
|
if ([response isKindOfClass:[NSHTTPURLResponse class]]) {
|
|
NSInteger statusCode = ((NSHTTPURLResponse *)response).statusCode;
|
|
if (statusCode != 200) {
|
|
completionHandler([[NSError alloc] initWithDomain:NSURLErrorDomain
|
|
code:statusCode
|
|
userInfo:nil], nil);
|
|
return;
|
|
}
|
|
}
|
|
|
|
// Decode image
|
|
decodeCancel = [weakSelf decodeImageData:data
|
|
size:size
|
|
scale:scale
|
|
resizeMode:resizeMode
|
|
completionBlock:completionHandler];
|
|
};
|
|
|
|
// Check for cached response before reloading
|
|
// TODO: move URL cache out of RCTImageLoader into its own module
|
|
NSCachedURLResponse *cachedResponse = [_cache cachedResponseForRequest:request];
|
|
if (cachedResponse) {
|
|
processResponse(cachedResponse.response, cachedResponse.data, nil);
|
|
return ^{};
|
|
}
|
|
|
|
// Add missing png extension
|
|
if (request.URL.fileURL && request.URL.pathExtension.length == 0) {
|
|
NSMutableURLRequest *mutableRequest = [request mutableCopy];
|
|
mutableRequest.URL = [NSURL fileURLWithPath:[request.URL.path stringByAppendingPathExtension:@"png"]];
|
|
request = mutableRequest;
|
|
}
|
|
|
|
// Download image
|
|
RCTNetworkTask *task = [_bridge.networking networkTaskWithRequest:request completionBlock:
|
|
^(NSURLResponse *response, NSData *data, NSError *error) {
|
|
if (error) {
|
|
completionHandler(error, nil);
|
|
return;
|
|
}
|
|
|
|
// Cache the response
|
|
// TODO: move URL cache out of RCTImageLoader into its own module
|
|
RCTImageLoader *strongSelf = weakSelf;
|
|
BOOL isHTTPRequest = [request.URL.scheme hasPrefix:@"http"];
|
|
[strongSelf->_cache storeCachedResponse:
|
|
[[NSCachedURLResponse alloc] initWithResponse:response
|
|
data:data
|
|
userInfo:nil
|
|
storagePolicy:isHTTPRequest ? NSURLCacheStorageAllowed: NSURLCacheStorageAllowedInMemoryOnly]
|
|
forRequest:request];
|
|
|
|
// Process image data
|
|
processResponse(response, data, nil);
|
|
|
|
}];
|
|
task.downloadProgressBlock = progressHandler;
|
|
[task start];
|
|
|
|
return ^{
|
|
[task cancel];
|
|
if (decodeCancel) {
|
|
decodeCancel();
|
|
}
|
|
OSAtomicOr32Barrier(1, &cancelled);
|
|
};
|
|
}
|
|
|
|
RCTLogError(@"No suitable image URL loader found for %@", imageTag);
|
|
return ^{};
|
|
}
|
|
|
|
- (RCTImageLoaderCancellationBlock)decodeImageData:(NSData *)data
|
|
size:(CGSize)size
|
|
scale:(CGFloat)scale
|
|
resizeMode:(UIViewContentMode)resizeMode
|
|
completionBlock:(RCTImageLoaderCompletionBlock)completionHandler
|
|
{
|
|
id<RCTImageDataDecoder> imageDecoder = [self imageDataDecoderForData:data];
|
|
if (imageDecoder) {
|
|
|
|
return [imageDecoder decodeImageData:data
|
|
size:size
|
|
scale:scale
|
|
resizeMode:resizeMode
|
|
completionHandler:completionHandler];
|
|
} else {
|
|
|
|
__block volatile uint32_t cancelled = 0;
|
|
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
|
|
if (cancelled) {
|
|
return;
|
|
}
|
|
UIImage *image = [UIImage imageWithData:data scale:scale];
|
|
if (image) {
|
|
completionHandler(nil, image);
|
|
} else {
|
|
NSString *errorMessage = [NSString stringWithFormat:@"Error decoding image data <NSData %p; %tu bytes>", data, data.length];
|
|
NSError *finalError = RCTErrorWithMessage(errorMessage);
|
|
completionHandler(finalError, nil);
|
|
}
|
|
});
|
|
|
|
return ^{
|
|
OSAtomicOr32Barrier(1, &cancelled);
|
|
};
|
|
}
|
|
}
|
|
|
|
#pragma mark - RCTURLRequestHandler
|
|
|
|
- (BOOL)canHandleRequest:(NSURLRequest *)request
|
|
{
|
|
NSURL *requestURL = request.URL;
|
|
for (id<RCTBridgeModule> module in _bridge.modules.allValues) {
|
|
if ([module conformsToProtocol:@protocol(RCTImageURLLoader)] &&
|
|
[(id<RCTImageURLLoader>)module canLoadImageURL:requestURL]) {
|
|
return YES;
|
|
}
|
|
}
|
|
return NO;
|
|
}
|
|
|
|
- (id)sendRequest:(NSURLRequest *)request withDelegate:(id<RCTURLRequestDelegate>)delegate
|
|
{
|
|
__block RCTImageLoaderCancellationBlock requestToken;
|
|
requestToken = [self loadImageWithTag:request.URL.absoluteString callback:^(NSError *error, UIImage *image) {
|
|
if (error) {
|
|
[delegate URLRequest:requestToken didCompleteWithError:error];
|
|
return;
|
|
}
|
|
|
|
NSString *mimeType = nil;
|
|
NSData *imageData = nil;
|
|
if (RCTImageHasAlpha(image.CGImage)) {
|
|
mimeType = @"image/png";
|
|
imageData = UIImagePNGRepresentation(image);
|
|
} else {
|
|
mimeType = @"image/jpeg";
|
|
imageData = UIImageJPEGRepresentation(image, 1.0);
|
|
}
|
|
|
|
NSURLResponse *response = [[NSURLResponse alloc] initWithURL:request.URL
|
|
MIMEType:mimeType
|
|
expectedContentLength:imageData.length
|
|
textEncodingName:nil];
|
|
|
|
[delegate URLRequest:requestToken didReceiveResponse:response];
|
|
[delegate URLRequest:requestToken didReceiveData:imageData];
|
|
[delegate URLRequest:requestToken didCompleteWithError:nil];
|
|
}];
|
|
|
|
return requestToken;
|
|
}
|
|
|
|
- (void)cancelRequest:(id)requestToken
|
|
{
|
|
if (requestToken) {
|
|
((RCTImageLoaderCancellationBlock)requestToken)();
|
|
}
|
|
}
|
|
|
|
@end
|
|
|
|
@implementation RCTBridge (RCTImageLoader)
|
|
|
|
- (RCTImageLoader *)imageLoader
|
|
{
|
|
return self.modules[RCTBridgeModuleNameForClass([RCTImageLoader class])];
|
|
}
|
|
|
|
@end
|